What is the density of gaseous ethane, #C_2H_6# at STP?

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Answer 1 · 2017-04-15T04:58:23

#1.3 g//L# 1.3 grams per liter.

At STP the molar concentration is one mole per molar volume or Avogadro's volume of approximately 22.4 liters.

The molar mass is the sum of the atoms

# 2 xx C = 2 xx 12 = 24 u#

# 6 xx H = 6 xx 1 = 6 u#

# 24 + 6 = 30 u#

So the density is # (30g)/(22.4 L)#

or #1.3 g//L#